The BAU is called to search for a man who is targeting children when an eight-year-old is found murdered on the Appalachian Trail.
Gibbs and the gang are called to assist when a naval officer threatens to throw himself from a building. However, the NCIS soon discover they have a full-blown murder investigation to deal with.
Sandra defends a hydrologist accused of spying for the Chinese government. However, the similarities between this and a former case that she sadly lost has her confidence shaken.
The second season picks up the story of the Walkers at the end of the summer, as Nora's video-mail to Justin in Iraq fills everyone in on the family doings. Meanwhile, Kitty is under pressure as the Senator's fiancée and not just as a staffer anymore.
As other seniors prepare their college applications, Ryan, Seth, Summer and Marissa ponder what they want to do with their lives.